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Summary of the gg Working Group

Summary of the gg Working Group. Convenors: Albert De Roeck, Michael Krämer, Maria Krawczyk, Steve Maxfield, Stefan Söldner-Rembold. 2 nd Workshop of Extended ECFA/DESY Study. Krakow September 2001 Intermediate meetings:

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Summary of the gg Working Group

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  1. Summary of the gg Working Group Convenors: Albert De Roeck, Michael Krämer, Maria Krawczyk, Steve Maxfield, Stefan Söldner-Rembold 2nd Workshop of Extended ECFA/DESY Study Krakow September 2001 Intermediate meetings: 13 December 2001, DESY-Zeuthen-Technical questions related to a gg collider option at TESLA. 17 December 2001, CERN- gg physics meeting For details visit http://www-clued0.fnal.gov/~soldner/lcgg.html St.Malo Apr 2002

  2. St. Malo meeting:Retain format of Krakow: • gg physics topics discussed in Higgs, SUSY,etc. Working groups. • gg session devoted to special topics (backgrounds, tools etc.) • Photon Collider technical aspects ( joint session) • V. TelnovA Code for the simulation of luminosities and QED backgounds at photon colliders • W. Da SilvaOn the luminosity measurement • K. MönigBackgrounds and interaction region simulation • A. De Roeckgg backgrounds in SIMDET • gg physics session • G. Moortgat-PickPOWER • M. Krawczyk / M. KrämerHigher order corrections for gg -> bb-bar • F. KraussStatus of the APACIC Monte Carlo: gg physics and how to match NLO with parton showers • F. ZarneckiDetailed Higgs -> WW and -> bb simulation • A. Finchb tagging in gg -> quarks at the Photon Linear Collider • D. AsnerDiscussion on the physics at LINX St.Malo Apr 2002

  3. Talks Given in Other Working Groups Higgs A.Rosca gg -> H -> bbbar S.Soldner-Rembold gg -> Higgs -> bbbar (given by M.Kraemer) D.Asner Progress on gg -> h* -> hh SUSY D. Asner Recent progress on gamma gamma -> charginos Electroweak and Alternatives Ilya Ginzburg Anomalous TGB Interactions in e g -> W u and gg ->WW. (leptonic W decay)+ Search for optimal event selection cuts in e g -> W u Generators T. Ohl CIRCE Version 2.0: Beam Spectra for Simulating Linear Collider and Photon Collider Physics St.Malo Apr 2002

  4. Talks at the CERN meeting 17 December 2001: • CLICHE study D. Schulte • Linx project M. Velasco • Luminosity Spectra V. Telnov • CIRCE 2.0 T. Ohl • QCD I L. Motyka • QCD II N. Timneanu • Higgs Physics at a gg collider D. Asner • Higgs-> gg and WW M. Velasco • Higgs mass and width determination M. Schmitt • Higgs Heavy E. Asakawa • Higgs Heavy M. Muehlleitner • Study of SM Higgs Boson Production at the Photon Collider at TESLAP. Niezurawski • Various potentials of 2HDM and the potential of Photon Collide resolve them M. Krawzyk or P. Osland • Anomalous TGC in gg> WW I. Bozovic • Review of the Zeuthen meeting K. Moenig • gg Spectra F. Zarnecki • http://www-clued0.fnal.gov/~soldner/lcgg.html St.Malo Apr 2002

  5. gg Tools • Luminosity spectra: • PHOCOL spectra V.Telnov • CIRCE programme T. Ohr • CompAZ parameterisation F. Zarnecki • APACIC++/AMEGIC++ for ggF.Krauss • New LO parton parameterisation for real gCJKL (M. Krawczyk) St.Malo Apr 2002

  6. b-tagging • (Alex Finch) • bb background NLO for SM light Higgs • (SS-R,, A. Rosca) • bb background LO for SM light Higgs (overlapping events) • (Piotr Niezurawski) St.Malo Apr 2002

  7. Summary • Important tools available: • PHOCOL V. Telnov • CIRCE T. Ohl • CompAZ A.F. Zarnecki • Progress in detailed simulations • Heavy Quark Final State • b-tagging • Realistic estimation of background to light Higgs search • LO →NLO for gg →bb(g) (rescaled LO works OK (Stefan Soldner-Rembold)) • New parton parameterisation for real g (improved treatment for heavy quarks à la ACOT) • - However: problem in describing existing gg→bb data • Heavy Boson Final State • Sensitivity to interference effects in gg→WW and gg→h→WW • Other gg collider studies (US) St.Malo Apr 2002

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